Isoreticular MOFs functionalized in the pore wall by different organic groups for high-performance removal of uranyl ions

摘要

We report the studies of uranyl adsorption on a series of isoreticular Metal-organic frameworks (MOFs) with the same 3D framework decorated by different organic groups in the pore wall. Scanning electron microscope and energy dispersive X-ray spectroscopy indicated that the sorbents were capable of encaging uranium from aqueous solution. Typical adsorption isotherms (Langmuir, Freundlich) studies showed different mechanism of sorption process and kinetic studies described different sorption behavior of the MOF materials, which were due to the different functional groups. Finally, two MOFs were successfully employed to extract U(VI) ions from simulated seawater.